When senators grilled the Federal Aviation Administration last week about how the agency could have let the high number of close calls between helicopters and commercial jetliners occur at Ronald Reagan Washington National Airport,

A Delta Air Lines flight had a reported close call Friday with a U.S. Air Force jet near Ronald Reagan Washington National Airport. CNN first reported the close call between the Airbus A319 that was departing Reagan and an Air Force T-38 jet,

The arrest of an F.A.A. employee on assault and battery charges comes as flight operations at the airport have been under scrutiny since a passenger jet and an Army helicopter collided in January.